I still think Kansas showing up is a legitimate possibility.

That and I've always liked 20 better than 18. Breaking everyone up into 3 divisions has its advantages, but I think there are more drawbacks. If you have 4 different regions of 5 then that works pretty well, and not just for football but for many other sports as well.

As others pointed out, you can't really schedule with frequency in mind once you go past 16. You can take an 18 school league and come up with a fairly nice rotation using 9 conference games, but you also create a lot of inequities with regard to teams in the same division getting more home games than others in a given season. With 20, you could always make sure the divisional alignment is fair with regard to home/away match-ups and other factors like travel.

I think schools like Oklahoma and Missouri and others even might be more comfortable if we take a couple of extra schools from the West and go to 20.

Texas, Texas Tech, Oklahoma, Oklahoma State, Kansas, and Iowa State would be a good core group to add.